Oil-well pump.



No. 767,454. PATENTED AUG. 16, 1904.

W. TAYLOR. OIL WELLPUMP.

APPLICATION FILED MAY 20. 1901.

NO MODEL.

UNITED STATES Patented August 16, 1904:.

PATENT @EETQE.

OIL-WELL PUMP.

SPECIFICATION forming part of Letters Patent No. 767,454, dated August 16, 1904.

Application filed May 20, 1901. Serial No. 60,994. (No model.)

structed in accordance with my invention, the.

pump being stationary. Fig. 2 is a similar view showing the piston in the act of rising.

Fig. 3 is an additional view in elevation,

partly broken away, illustrating the top connection with the piston. Fig. 41 is a detail view in elevation of the valved piston. Figs. 5, 6, and 7 are cross-sectional views inclicated by the lines V V, V1 V1, and VII VII 'of Fig. 1.

My invention relates to improvements in pumps for oil or other wells, and is designed for the purpose of providinga pump adapted to operate upon the upward stroke; and it consists of the construction by which the piston may fall by gravity so as to be operated by cable, and the means by which such operation is facilitated and rendered possible consists in the peculiar construction and arrangement of the parts of the valved piston, together with other features of construction, which I shall now proceed to describe.

Referring now to the drawings, 2 represents the usual tubing of an oil-well, to the bottom of which is secured, by couplings 3, the working barrel 1 of the usual construction.

5 is the hollow piston-rod of the pump, suspended at the top from the coupling 6 by cable 7, operated from above by a wheel or any other suitable or usual means for lifting and dropping the cable alternately, as by shackle-work, as is well understood and practiced in the art of drilling and pumping wells.

Upon the lower end of the piston-rod 5 is screwed my improved valved piston A, while above this valved piston the packing-chamber 8 surrounds the piston-rod containing packing 9, which packing is compressed by follower 10, inserted at the upper portion of chamber 8 and surmounted by coiled or other spring 11, which is adapted to constantly compress the packinguntil arrested by flange 12. The spring is compressed and inclosed by a shell or coping 13, screwed down over the upper end of the chamber 8, as shown, and when so secured forms, with the chamber 8, a cylindrical extension. therefrom of slightly less diameter than the inner diameter of the tubing.

Chamber 8 is provided on its outer lower side with a tapered extremity or extension 14, by which the packing-chamber and its supported and suspended portions are tightly set in the upper end of the working barrel, as shown, so as to make a supporting connection therewith. Screwed around the lower extremity 15 of the packing-chamber is a tubular sheath 16, which extends downwardly for a considerable distance within the working barrel and which is provided at its lower end with the usual standing valve 17 and cup 18, through the opening 19 of which valve oil will pass upwardly during the upward travel of the valved piston, but which will prevent the downward flow of oil in the usual manner.

The valved piston A terminates at its lower portion in the usual packed portion 20, having the ordinary cups 21, which constitute a part of'valved piston A, and upwardly through this valved piston by the central passage 22 the oil will flow during its downward travel. The valved piston A is provided with the upper and lower valve-seats 23 2%, adapted to be closed by the balls 25 of usual form, the upper ball being subjected to the pressure of the column of oil contained in the piston-rod 5. Above each valve-seat is sufiicient space for the free movement of the balls, and between the valve-seats 23 and 24 this space is inclosed within the interior of a connecting-shell 26, which is provided with one or more openings 27, opening outwardly to the interior of the sheath 16, whereby during the downward movement of the valved piston A oil will pass freely up through opening 22, through valveseat 24, outwardly through openings 27, and into the surrounding space 28, and it will be r the upper end of the working barrel, a valved here observed that the downward action of the piston will be rendered easy by reason of the al, sence of any pressure which would otherwise interfere with its action, and the more force of gravity will therefore accomplish the lowering downward travel of the piston. This is a feature of great advantage and value in this pump, as it enables the operator to utilize the force of gravity for the downward stroke. Upon the upward movement of the piston, as indicated by the arrow in Fig. 2, the conditions of the valves in valved piston A will be reversed, the lower ball seating on seat 24:, while upward movement forces the oil back through openings 27 to interior of shell 26 and upwardly through valve-seat 23, as indicated, and into the interior of the hollow piston-rod 5, from whence it escapes at the top in the usual manner into the tubing above the packing-chamber.

It will be observed that various changes and modifications may be made in the construction, design, or proportions of the pump without departing from my invention, as I do not desire to be limited to the exact construction as shown, but to include therein all such changes and variations as may be made by the skilled mechanic.

Having described my invention, what I claim is- 1. In an oil-pump, the combination of a working barrel, a sheath provided with a standing valve at its lower end, a packingc'hamber secured to its upper end, provided with a tapering portion adapted to seat upon piston within the sheath, a central valve-controlled inlet-opening therein, a tubular shell provided with lateral openings above the inletopening, an upper valve, an inelosing shell, and a hollow piston rod connected therewith and passing through the packingchamber.

2. In an oil-well pump, the combination with the tubing of a well and a working barrel suspended therefrom: of apacking-chamber adapted to rest upon the upper end of the working barrel, a sheath suspended therefrom provided with a standing valve on its lower end, a central hollow piston-rod passing down through the packing, a valved piston secured upon the lower end. of the pistonrod consisting of a cylindrical shell, provided with interior upper and lower check-valves, with intervening ports through the shell and a lower packed extension, substantially as set forth.

3. In an oil-well pump, the combination with the tubing of a well and a working barrel suspended therefrom: of a packing-chamber adapted to rest upon the upper end of the working barrel, means for compressing the packing, a sheath suspended therefrom pro vided with a standing valve on its lower end, a central hollow pistonrod passing down through the packing, a valved piston secured upon the lower end of the piston-rod consisting of a cylindrical shell provided with interior upper and lower check-valves with intervening ports through the shell and a lower packed extension, substantially as set forth.

4:. An oil-well pump, comprising a packing chamber provided with a supporting exterior by which it may be suspended in the well, an upper coping mounted on said packing-cham- 'ber, a spring contained in the coping for com- J. F. MOKENNA, C. M. CLARKE. 

